Hydrochloric Acid → 1-(6-Hydroxy-2-naphthyl)ethan-1-one
Reaction equation
Cl.C[O:3][C:4]1[CH:5]=[C:6]2[C:11](=[CH:12][CH:13]=1)[CH:10]=[C:9]([C:14](=[O:16])[CH3:15])[CH:8]=[CH:7]2>ClCCl>[OH:3][C:4]1[CH:5]=[C:6]2[C:11](=[CH:12][CH:13]=1)[CH:10]=[C:9]([C:14](=[O:16])[CH3:15])[CH:8]=[CH:7]2Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
In a 3 L two-neck round bottom flask, equipped with a reflux condenser and a dropping funnel, 2 L of hydrochloric acid (d=1.16) were stirred and heated to boiling. A solution of 6.06 g (30.3 mmol) of 1-(6-methoxy-2-naphthyl)-1-ethanone (prepared as described in Arsenijevic et al., Org. Synth. Coll. 6:34 (1988), the disclosure of which is incorporated herein by reference) in a minimum amount of dichloromethane was added, and the mixture was stirred and heated at reflux for 2 hours. The hot solution was filtered through a mineral wool plug to remove oily residue. The solid that separated after cooling was filtered on a glass frit and dissolved in 130 mL of ethyl acetate. The solution was washed with brine, dried with anhydrous magnesium sulfate and evaporated to give 5 g (89%) of 1-(6-hydroxy-2-naphthyl)1-ethanone.